Sin²(1,5+32π)+cos²1/5+cos(-π/4)+sin(-π/6)=
=(sin²1,5+cos²1,5)+√2/2 - 1/2= 1+ √2/2 - 1/2 = 1/2 +√2/2 = (1+√2)/2
X^2 + nx + 6 = 0
D = b^2 - 4ac = n^2 - 4*1*6 = n^2 - 24 = 0
<span>n = кор (24) = кор (4*6) = 2 кор(6)</span>
0,25∧(х-1)=8
25/100∧(х-1)=2³
1/4∧(х-1)=2³
1/2²∧(х-1)=2³
2⁻²∧(х-1)=2³
2∧(2-2х)=2³
2-2х=3
2х=2-3
2х=-1
х=- 1/2=-0,5